Explain whether rounding or compatible numbers gives a closer estimate for the product 48 times 123 equals 5904

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

Miss henderson wants to build a fence around a rectangular garden in her backyard in the scale drawing the perimeter of the garden is 14 in of the actual length of a b is 20 ft how many feet of fencing what you need

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a